package cn.edu.zafu.bigdata.lekang;

public class Hello {
    Runnable r1=() ->{System.out.println(this);};
    Runnable r2=() ->{System.out.println(toString());};

    public String toString() { return "Hello,world!";};

    public static void main(String[] args) {
        new Hello().r1.run();
        new Hello().r2.run();
    }
}
